What then does Chrysippus teach us? The reply is, "to know that these things are not false, from which happiness comes and tranquillity arises. Take my books, and you will learn how true and conformable to nature are the things which make me free from perturbations." O great good fortune! O the great benefactor who points out the way! To Triptolemus all men have erected temples and altars, because he gave us food by cultivation; but to him who discovered truth and brought it to light and communicated it to all, not the truth which shows us how to live, but how to live well, who of you for this reason has built an altar, or a temple, or has dedicated a statue, or who worships God for this? Because the gods have given the vine, or wheat, we sacrifice to them: but because they have produced in the human mind that fruit by which they designed to show us the truth which relates to happiness, shall we not thank God for this?